1 files changed, 4 insertions, 3 deletions

diff --git a/util-linux/mkfs_ext2.c b/util-linux/mkfs_ext2.c
index da27dc77d..5d5429f07 100644
--- a/util-linux/mkfs_ext2.c
+++ b/util-linux/mkfs_ext2.c
@@ -88,13 +88,14 @@ static uint32_t div_roundup(uint64_t size, uint32_t n)
 static void allocate(uint8_t *bitmap, uint32_t blocksize, uint32_t start, uint32_t end)
 {
         uint32_t i;
+
+//bb_info_msg("ALLOC: [%u][%u][%u]: [%u-%u]:=[%x],[%x]", blocksize, start, end, start/8, blocksize - end/8 - 1, (1 << (start & 7)) - 1, (uint8_t)(0xFF00 >> (end & 7)));
         memset(bitmap, 0, blocksize);
         i = start / 8;
         memset(bitmap, 0xFF, i);
-        bitmap[i] = 0xFF >> (8 - (start & 7));
-//bb_info_msg("ALLOC: [%u][%u][%u]: [%u-%u]:=[%x],[%x]", blocksize, start, end, start/8, blocksize - end/8 - 1, 0xFF >> (8 - (start & 7)), (uint8_t)(0xFF << (8-(end&7))));
+        bitmap[i] = (1 << (start & 7)) - 1; //0..7 => 00000000..01111111
         i = end / 8;
-        bitmap[blocksize - i - 1] = 0xFF << (8 - (end & 7));
+        bitmap[blocksize - i - 1] |= 0x7F00 >> (end & 7); //0..7 => 00000000..11111110
         memset(bitmap + blocksize - i, 0xFF, i); // N.B. no overflow here!
 }